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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _CRIS_PAGE_H |
3 | #define _CRIS_PAGE_H | |
4 | ||
556dcee7 | 5 | #include <arch/page.h> |
b0e86f0a | 6 | #include <linux/const.h> |
1da177e4 LT |
7 | |
8 | /* PAGE_SHIFT determines the page size */ | |
9 | #define PAGE_SHIFT 13 | |
b0e86f0a | 10 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
1da177e4 LT |
11 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
12 | ||
1da177e4 LT |
13 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) |
14 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
15 | ||
16 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
17 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
18 | ||
769848c0 MG |
19 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
20 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
1da177e4 LT |
21 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
22 | ||
23 | /* | |
24 | * These are used to make use of C type-checking.. | |
25 | */ | |
26 | #ifndef __ASSEMBLY__ | |
27 | typedef struct { unsigned long pte; } pte_t; | |
1da177e4 LT |
28 | typedef struct { unsigned long pgd; } pgd_t; |
29 | typedef struct { unsigned long pgprot; } pgprot_t; | |
2f569afd | 30 | typedef struct page *pgtable_t; |
1da177e4 LT |
31 | #endif |
32 | ||
33 | #define pte_val(x) ((x).pte) | |
1da177e4 LT |
34 | #define pgd_val(x) ((x).pgd) |
35 | #define pgprot_val(x) ((x).pgprot) | |
36 | ||
37 | #define __pte(x) ((pte_t) { (x) } ) | |
1da177e4 LT |
38 | #define __pgd(x) ((pgd_t) { (x) } ) |
39 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
40 | ||
41 | /* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */ | |
42 | /* for that before indexing into the page table starting at mem_map */ | |
bb872f78 | 43 | #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) |
1da177e4 LT |
44 | #define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr) |
45 | ||
46 | /* to index into the page map. our pages all start at physical addr PAGE_OFFSET so | |
47 | * we can let the map start there. notice that we subtract PAGE_OFFSET because | |
48 | * we start our mem_map there - in other ports they map mem_map physically and | |
49 | * use __pa instead. in our system both the physical and virtual address of DRAM | |
50 | * is too high to let mem_map start at 0, so we do it this way instead (similar | |
51 | * to arm and m68k I think) | |
52 | */ | |
53 | ||
54 | #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)) | |
1da177e4 LT |
55 | #define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT) |
56 | ||
57 | /* convert a page (based on mem_map and forward) to a physical address | |
58 | * do this by figuring out the virtual address and then use __pa | |
59 | */ | |
60 | ||
61 | #define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) | |
62 | ||
1da177e4 LT |
63 | #ifndef __ASSEMBLY__ |
64 | ||
1da177e4 LT |
65 | #endif /* __ASSEMBLY__ */ |
66 | ||
67 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
68 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
69 | ||
bb872f78 | 70 | #include <asm-generic/memory_model.h> |
5b17e1cd | 71 | #include <asm-generic/getorder.h> |
fd4fd5aa | 72 | |
1da177e4 LT |
73 | #endif /* _CRIS_PAGE_H */ |
74 |